young



(No Model. 2 Sheets-Sheet 1.

- D. T. & H. W. YOUNG.

BOLT POROER .Patehted Aug. 15, 1893.

(No Model.) 2 Sheets-Sheet 2. D. T. & H. W. YOUNG;

BOLT PORGBR. No. 503,188. 7 Patented Aug. 15,1893.

03.5, I Fm. 41/52 m7 U ITED STATES PATENT OFFICE.

DAVID THOMAS YOUNG AND HARRY WILLIAM YOUNG, OF BIRMINGHAM. ENGLAND.

BOYLT-FORCER.

SPECIFICATION forming part of Letters Patent No. 503,188, dated August15, 1893.

Application filed November 10, 1892. Serial No. 451,543. (No model.)Patented in England June 26, 1891, No. 10,884, and in Germany December14, 1891, No. 65,593.

To all whom it may concern:

Be it known that we, DAVID THOMAS YOUNG and HARRY WILLIAM YOUNG,citizens of Great Britain,residingatBi1-mingham,in the county ofWarwick, England, have invented certain new and useful Improvements inBolt-Forcers and we do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

Patents for this invention have been granted to us in Great Britain, No.10,884, dated J une 26, 1891, and in Germany dated December 14, 1891,No. 65,593.

Our invention relates to the manner in which we construct and arrangehydraulic jacks and hydraulic forcing appliances, particularlyapplicable for forcing out bolts and pins from couplings of shafts, andrelates principally to the improved manner in which we arrange thefittings and parts of jacks, whereby a blow or shock can be communicatedto the bolt or pin while under the pressure from the hydraulic ram orforcing head of our jack or appliance. By this additional introductionof a blow or sudden shock we are enabled to give the bolt key or pin astarting move in a manner more likely to cause its ejectment from thecoupling shaft or other shaft than is at present possible with thesimple thrust or steady push given from and by the ram or head alone;

In carrying our invention into effect in one manner we construct thebolt forcing jack or appliance as set forth in the accompanying sheet ofexplanatory drawings in which-- Figure 1 is a front elevation; Fig. 2 anend elevation with the cistern shown in section; Fig. 3 a verticalsection through the ram and v cistern, and Fig. 4 a sectional planthrough the cylinder with the ram removed, while Fig. 5 is a detailelevation of our solid ram.

The ram A of our hydraulic jack we arrange with projecting tails orstems A, A whichpass through the end of the hydraulic cylinder and itsgland cover K sufficiently to permit of the tail A when solid beingstruck with a hammer or other instrument even when the ram has made itsfull inner stroke. The cylinder B we cast or mount at right angles tothe pump cistern 0 or in any other suitable position so that the ram andits tails have free movement in the direction of the center line of thebolt, shaft spindle or pin which is to be operated upon. Theinner-portion of the ram tail A forms with the body of the ram A anannular space B for the liquid under pressure from the pump E to workin, a suitable leather or other cup or ring a being provided to keep theliquid from escaping, and a similar ring, or gland and packing It beingarranged for the tail rod or end A to work through. The outer head orface of the ram when solid as shown on Fig. 5 We shape to suit the headof the bolt or pin or we curve it slightly for the better transmissionof the pressure.

. The cistern 0, cover D, release stop H and the pump piston F weconstruct in any usual or ordinary manner, and we work the pump by meansof any ordinary hand lever upon the spindle G. We arrange detachableclaws, legs or arms N, N on the hydraulic cylinder and cistern so thatit may be in the most convenient position for working upon a bolt orshaft; and we tie the legs or supports together by means of distancebolts 0, O, and secure them to the body of the cylinder by providingjaws N, N to fit and be pinned on to lugs or projections B by means ofpins n.

We sometimes cast or form the claws, legs or arms in one piece with orsolid with the body or cylinder A, and we vary the shape of such solidlegs or claws to suit any particular requirement.

By another arrangement of our thrusting ram we obviate the shock to theram itself when communicating a blow to the pin or shaft which is beingoperated upon, by constructing our ram A, A, A of a tubular or hollowform as illustrated in Fig. 3, so that a drift or other rod L with orWithout a cap or cover M may be placed through the length of the hollowram to meet the bolt or pin, and a blow given to the outer end of thisdrift for starting the pin, bolt or shaft from its tight position.

Instead of carrying our separate striking or starting drift rod L rightthrough the entire length of our ram A, A, A we sometimes cause thedrift rod to enter a hole formed within one tail red A and tocommunicate its blow to the ram by striking the solid end or bottom ofthe hole formed within the tail rod of the ram.

We do not limit the application of our hollow ram or projecting tail ramto the particular arrangements of arms and cistern and pump fittingshereinbefore described but we employ our improved rams and cylinders towork with any ordinary kind of forked supporting frame or arrangement ofclaw supports, with similar advantage, for the purpose of permitting ofthe application of a blow or shock in addition to the ordinary thrust ofthe hydraulic jack or other hydraulic forcing appliances.

The frame N is always in two parts, or is forked, or bifurcated, so asto clear the head of the bolt which comes between the two hooks 2 whichbear against the face of the coupling while the end M of the stempresses on the end of the bolt and forces it out of the hole in thecoupling.

What we claim is l. A portable bolt forcer, comprising a hooked frameadapted to engage with the coupling flange, a hydraulic cylinder securedto the frame, a piston provided with a stem projecting through the upperend of the cylinder, and a pump secured against the side of the cylinderclear of the said stem,wherebya blow may be delivered on the center lineof the said stem and piston to start the bolt while under hydraulicpressure.

2. The combination, with a bifurcated frame, of a hyd raulic cylinder, apiston Working in the cylinder and provided with a tubular piston rod,and a stem passing through the said rod, substantially as and for thepurpose set forth.

3. The combination, with the hydraulic cylinder provided withrectangular projecting lugs, of the bifurcated frame provided with jawsadapted to engage with the said lugs, and the retractibie pins forconnecting the said frame and lugs, substantially as set forth.

In testimonywhereof we affix on r signatures in presence of twowitnesses.

DAVID THOMAS YOUNG. HARRY WILLIAM YOUNG. \Vitnesscs:

WILLIAM EVANS, ALBERT EDWARD PARKER.

